1.\" $OpenBSD: basic.in,v 1.3 2017/07/04 14:53:23 schwarze Exp $ 2.Dd $Mdocdate: July 4 2017 $ 3.Dt MATRIX-BASIC 1 4.Os 5.Sh NAME 6.Nm matrix-basic 7.Nd matrixes in equations 8.Sh DESCRIPTION 9initial text 10.EQ 11left ( 12matrix { ccol { a sub 11 above a sub 21 } ccol { a sub 12 above a sub 22 } } 13right ) 14left ( 15pile { b sub 1 above b sub 2 } 16right ) 17left [ 18bold pile { sin above "sin" } 19right ] 20.EN 21final text 22